Sugarboy (--Shugaboi) is the Earth Land counterpart of Sugarboy and a member of the Legion Corps of Zentopia, who uses Dog Whistle Magic as his form of magic.
Dog Whistle Magic makes Sugarboy's body lets free a large amount of green sticky mucus, which oozes from his clothes and quickly expands to form a large mass. The globules are described as having a mind of their own, and Sugarboy refers to the ooze as his "Hound Dogs". When touched, the phlegm surrounds and engulfs the person, trapping them and stopping them from being able to perform Magic. The gloop has also been shown to consume Magic, "eating" up the attacks of many Mages. Sugarboy claims that his "Hound Dogs" enjoy eating different types of Magic, but that they especially enjoyed Natsu's flames. The ooze has been shown to take on many shapes, such a forming a hand to pick up and throw around Sugarboy's enemies. When Sugarboy has finished his attacks, the Magic has an almost reverse retreat, being sucked back into Sugarboy's clothing. After being touched by the ooze, the victim appears to become fatigued and drained of Magic power, falling to the ground in a sleep-like manner.
(Source: Fairy Tail Wikia)